# a=1
# b=2
# c=False
# dic={'name':'姓名1','age':'年龄1',2:1}
# dic1=dict([('a','1'),('b','2')])
# tup=tuple('hello')
# print(str(a),type(tup))
# print(dic1)
# if(a<b):
#     print('a小于b')
#     c=True
# if(c):
#     print('c终于变成了ture',dic["name"])

# def http_error(status):
#     match status:
#         case 400:
#             return "Bad request"
#         case 404:
#             return "Not found"
#         case 418:
#             return "I'm a teapot"
#         case _:
#             return "Something's wrong with the internet"
# mystatus=400
# print(http_error(400))

# http_error(400)

# a=0
# while a<2:
#     a+=1
#     print('执行了')
# else:
#     print('默认条件')
arr={1,2,3,4,5}
itr=arr
for item in itr:
    print(item)

